Atomic Theory and Structure Pre-Assessment

The positively charged particle in the center of an atom is called the ___.

• proton
• electron
• neutron
• quark

The electron has a ___.

• negative charge
• neutral charge
• positive charge
• static charge

Tags

NGSS.MS-PS2-3

Where is most of the MASS of an atom located?

• In the nucleus

• Electron cloud

• In the electron

• Evenly spread throughout the atom

Which statement correctly describes the relative masses of subatomic particles?

• Protons and neutrons have almost equal masses, and electrons have a much smaller mass.
• Neutrons and electrons have almost equal masses, and protons have a much larger mass.
• Protons, neutrons, and electrons all have roughly the same masses.
• Electrons and protons have the same masses, and neutrons have no mass.

Which electrical charge does a neutron have?

• neutral
• alternating between positive and negative
• negative
• positive

Which two types of atomic particles carry an electrical charge?

• protons and electrons
• quarks and neutrons
• neutrons and electrons
• protons and neutrons

Tags

NGSS.MS-PS2-3

Which two particles are in the atomic nucleus?

• protons and neutrons
• neutrinos and electrons
• neutrons and ions
• electrons and protons

Tags

NGSS.MS-PS1-1

The atom has an overall ___.

• neutral charge
• negative charge
• positive charge
• static charge

In modern atomic models, where are electrons found?

• In an electron cloud
• In the nucleus
• Between protons and neutrons
• Floating freely between atoms

What is an atom?

• A large molecule

• Largest piece of matter

• Smallest piece of matter

• A molecule made of ions

Tags

NGSS.MS-PS1-1